www.MSruns.com read only forum (Jan.15,2018)

We added a TPS to the existing carburettor on the GX31 by grafting a spindle onto the plastic throttle arm assembly - quite tricky. On My Honda 90 cc engine which has a slide throttle pulled by a cable (ex-motorcycle) I added a linear pot via a link to the throttle pedal. This works well enough alth...

The injector is a special unit made by Bosch for the competition - 10 grams/min. It is available from http://www.eshopsem.com/cataloguegb.php but they may not supply to you unless you are an entry. Depending on your engine size you may have some success with 'normal' motorcycle units although your i...

Spent some time on a mini-rolling road and have got it mapped up real sweet on petrol & E100 (bioethanol). Need to create more load for the road as it's hard to keep the engine in each cell, but by guessing you can fill some gaps.

Next up is LPG!!

Gareth

Had some more success today when we upgraded our MS1 (2.2) to a MS2 Daughter board and connected it to the loom I'd made for our Honda GX31 4 stroke strimmer motor. After getting it warmed up on the carb, we switched fuelling to the injector and pulled the start cord. Not only did it run, but with a...

Well, it runs, on LPG only so far, but everything works and once the running pressure and fuel pwms (and jet sizes) have been refined it's on with the tuning. Running MS1 with MSExtra code, fuel only, TechEdge WBO2, switchable maps for E85/LPG (when I can work that bit out) in a standard Honda 90 cc...